You have to say this word out loud. And no, it’s not a synonym for σκύβαλον, that favorite of every puerile budding Hellenist. Get your mind out of the ἀφεδρών! In fact, it’s a bird, technically, a hoopoe, Latin name Upupa epops. And, no, I didn’t just make that up. Here’s a pic:
What sound does the ποῦπος make? I’m glad you asked. LSJ tells us that it goes: ποποποῖ. And now you know . . .